Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a34220702ad61a…

MALICIOUS

PDF

42.6 KB Created: 2020-08-14 09:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bcecb23995b1277df157b75ebe9a2ab SHA-1: 12fd30852517552d8c87db2d9f37568b4c1b4828 SHA-256: 17a34220702ad61a013bf143f6a11bca3129803cbe3cda0f8f9a708dc8ca1e69
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic to attract users searching for specific content. The primary malicious redirector link, https://ttraff.ru/wb?keyword=tally%20erp%209%20exercise%20book%20pdf%20free%20download, is a strong indicator of malicious intent, likely serving as a gateway to further malicious content or phishing pages. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=tally%20erp%209%20exercise%20book%20pdf%20free%20download
    • http://dopanali.thickandthintheatreproductions.com/uploads/1/3/2/8/132814742/1716113.pdf
    • http://ropotetor.lake-n-golf.com/uploads/1/3/1/4/131454415/254790.pdf
    • http://files.asliagirbas.com/uploads/1/3/0/7/130776841/07f27bfa0f9527.pdf
    • http://files.danettemariealbino.com/uploads/1/3/2/7/132712209/7259567.pdf
    • http://vowijobut.greatmausoleums.com/uploads/1/3/1/4/131407498/davubudilume_zijaso_gupaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3538/6265/files/selection_sort_algorithm_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/the_bulletproof_diet_roadmap.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/17643623967.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/91371442147.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/gipipifi.pdf
    • https://cdn.shopify.com/s/files/1/0443/1613/1484/files/mixed_modal_verbs_exercises_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0438/2985/4368/files/bivanodafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/fafovukexawesidedul.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/78354830752.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/49193821238.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/89200584405.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/dezelikisegepave.pdf
    • https://cdn.shopify.com/s/files/1/0432/7614/0710/files/11942267597.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000666c.bin
d03983462a3ab522d5e534718018ec54b8fca33ade2daefb58783e87615b9bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666C 5720 bytes
font_01_sfnt_off00007a07.bin
4db78ec8aa1f171b87f665b25fa246950d3c5b7af399f9219f9ecc7a4aaa4421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A07 10136 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.